[jennasys]

I used GWT a long time ago and it was great for being able to write a complex algorithm that had to run on the server as well as in the browser. It saved a lot of time and trouble, and you always knew that the version running on the server was the same as the one running in the browser.

If you are already adept at coding in JavaScript and you actually enjoy using JS, then you would not be the audience for these Python (or other language) web dev projects. However, if you are not a seasoned JS developer or you just don't like coding in JS as a personal preference, then I think these are worth taking a look at. I hear the phrase "just learn JavaScript" quite a bit in regards to these, but I believe learning an API is easier than learning and being proficient in an entire programming language. These tools all have their own approach as well and some are more suited to certain tasks/audiences than others.